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• Discord.py Music Bot problem with FFmpeg on heroku

  16 mai 2020, par Phantom_7331

  I'm coding my first music bot for discord and successfully tested it on the localhost. After that, I moved it on Heroku and installed FFmpeg buildpack for it. But for some reason, it doesn't work.
Here is proof that I installed FFmpeg buildpack on Heroku : Screen

  



  Here is my code (that works well on localhost) :

  



  youtube_dl.utils.bug_reports_message = lambda: ''

ytdl_format_options = {
'format': 'bestaudio/best',
'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
'restrictfilenames': True,
'noplaylist': True,
'nocheckcertificate': True,
'ignoreerrors': False,
'logtostderr': False,
'quiet': True,
'no_warnings': True,
'default_search': 'auto',
'source_address': '0.0.0.0'
}

ffmpeg_options = {
    'options': '-vn'
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)

class YTDLSource(discord.PCMVolumeTransformer):
def __init__(self, source, *, data, volume=0.5):
    super().__init__(source, volume)

    self.data = data

    self.title = data.get('title')
    self.url = data.get('url')

@classmethod
async def from_url(cls, url, *, loop=None, stream=False):
    loop = loop or asyncio.get_event_loop()
    data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))

    if 'entries' in data:
        data = data['entries'][0]

    filename = data['url'] if stream else ytdl.prepare_filename(data)
    return cls(discord.FFmpegPCMAudio(filename, **ffmpeg_options), data=data)

@client.command()
async def join(ctx):
channel = ctx.message.author.voice.channel
if ctx.voice_client is not None:
    return await ctx.voice_client.move_to(channel)
await channel.connect()

@client.command()
async def play(ctx, *, URL):
    async with ctx.typing():
        player = await YTDLSource.from_url(url)
        ctx.voice_client.play(player, after=lambda e: print('Player error: %s' % e) if e else None)
    await ctx.send('Now playing: {}'.format(player.title))


  


• Muting audio when video is not being played in complex filtergraph

  18 février 2020, par Vitalis Hommel

  My goal is to silence audio till when the appropriate video is playing.

  This is what I tried

  ffmpeg -i a.mp4 -itsoffset 00:00:4.061 -i b.mp4 -itsoffset 00:00:8.016 -i c.mp4 -itsoffset 00:00:12.016 -i d.mp4 -filter_complex "[0:a][2:a][3:a]amerge=inputs=3,volume=0[a0];[1:a]adelay=4061[a1];[a0][a1]amerge=inputs=2[audio]..." -map "[audio]" ... -r 60 -vcodec h264 zusammen.mp4

  It starts playing together at the start to be overlayed at 4061. How do I hear the audio in sync with video while what is not being played is muted ?

• avformat/mpegtsenc : Fix mpegts_write_pes() for private_stream_2 and other types

  25 avril 2021, par zheng qian

  avformat/mpegtsenc : Fix mpegts_write_pes() for private_stream_2 and other types
  According to the PES packet definition defined in Table 2-17 of ISO_IEC_13818-1
  
  specification, some fields like PTS/DTS or pes_extension could only appears if
  
  the stream_id meets the condition :
  if (stream_id != 0xBC &&  // program_stream_map
  
      stream_id != 0xBE &&  // padding_stream
  
      stream_id != 0xBF &&  // private_stream_2
  
      stream_id != 0xF0 &&  // ECM
  
      stream_id != 0xF1 &&  // EMM
  
      stream_id != 0xFF &&  // program_stream_directory
  
      stream_id != 0xF2 &&  // DSMCC_stream
  
      stream_id != 0xF8)    // ITU-T Rec. H.222.1 type E stream
  And the following stream_id types don't have fields like PTS/DTS :
  else if ( stream_id == program_stream_map
  
  || stream_id == private_stream_2
  
  || stream_id == ECM
  
  || stream_id == EMM
  
  || stream_id == program_stream_directory
  
  || stream_id == DSMCC_stream
  
  || stream_id == ITU-T Rec. H.222.1 type E stream ) 
  
      for (i = 0 ; i < PES_packet_length ; i++) 
  
          PES_packet_data_byte
  
      
  
  
  Current implementation skipped the check of stream_id causing some kind of
  
  streams like private_stream_2 to be incorrectly written with actually a
  
  private_stream_1-like PES header with PTS/DTS field. For example, Japan DTV
  
  transmits news and alerts through ARIB superimpose that utilizes
  
  private_stream_2 still could not be remuxed correctly for now.
  This patch set fixes the remuxing for private_stream_2 and
  
  other stream_id types.
  Signed-off-by : zheng qian <xqq@xqq.im>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/mpegtsenc.c